Quantized Grain Boundary States Promote Nanoparticle Alignment During Imperfect Oriented Attachment

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Andrew P LangeSelim Elhadj

Abstract

Oriented attachment (OA) has become a well-recognized mechanism for the growth of metal, ceramic, and biomineral crystals. While many computational and experimental studies of OA have shown that particles can attach with some misorientation then rotate to remove adjoining grain boundaries, the underlying atomistic pathways for this "imperfect OA" process remain the subject of debate. In this study, molecular dynamics and in situ transmission electron microscopy (TEM) are used to probe the crystallographic evolution of up to 30 gold nanoparticles during aggregation. It is found that Imperfect OA occurs because 1) grain boundaries become quantized when their size is comparable to the separation between constituent dislocations and 2) kinetic barriers associated with the glide of grain boundary dislocations are small. In support of these findings, TEM experiments show the formation of a single crystal aggregate after annealing nine initially misoriented, agglomerated particles with evidence of dislocation activity and twin formation during particle/grain alignment. These observations motivate future work on assembled nanocrystals with tailored defects and call for a revision of Read-Shockley models for grain boundary energies in n...Continue Reading

References

Aug 19, 2000·Science·A P Alivisatos
Nov 22, 2002·Physical Review Letters·Dorel MoldovanSimon R Phillpot
Aug 3, 2004·Science·Zhiwei ShanS X Mao
Dec 15, 2005·The Journal of Chemical Physics·Gregory GrocholaIan K Snook
May 27, 2006·Science·Dennis M DimidukMichael D Uchic
Mar 16, 2007·Proceedings of the National Academy of Sciences of the United States of America·Ting ZhuSubra Suresh
Mar 11, 2010·Nanotechnology·S SimõesP J Ferreira
May 5, 2011·Nature Communications·R GruppJ Banhart
Feb 20, 2014·Proceedings of the National Academy of Sciences of the United States of America·Bin ChenHo-kwang Mao
Jul 18, 2014·Nature Communications·Lihua WangXiaodong Han
Jul 23, 2014·Scientific Reports·Panagiotis GrammatikopoulosMukhles Sowwan
Oct 10, 2014·Nano Letters·Zainul AabdinUtkur Mirsaidov
Nov 8, 2014·Science·Amit SamantaWeinan E
Mar 18, 2017·Physical Review Letters·Xiaoling ZhouBin Chen
Feb 7, 2018·Scientific Reports·Seyed Moein Rassoulinejad-Mousavi, Yuwen Zhang

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